/Engine/Source/Editor/UnrealEd/Public/EdGraphUtilities.h
Clones (deep copies) aUEdGraph, including all of it's nodes and pins and their links, maintaining a mapping from the clone to the source nodes (even across multiple clonings) A NewOuter of NULL indicates the transient package
static [UEdGraph](API\Runtime\Engine\EdGraph\UEdGraph) * CloneGraph ( [UEdGraph](API\Runtime\Engine\EdGraph\UEdGraph) * Source, [UObject](API\Runtime\CoreUObject\UObject\UObject) * NewOuter, [FCompilerResultsLog](API\Editor\UnrealEd\Kismet2\FCompilerResultsLog) * MessageLog, bool bCloningForCompile )